Heinz Schaffer, commander of the German submarine U-977, talks about the events of World War II, about serving in the submarine fleet, without hiding its hardships, dangers and living conditions; about the Battle of the Atlantic and the amazing rescue of a submarine that made a long autonomous transition to Argentina, where the team was awaiting imprisonment and accusation of saving Hitler. The information provided in the book is especially valuable in that it is given from the position of the enemy of the USSR in the war.